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Finding the Fourth Proportional to 619,786.60, 929,679.90 and 514,810.60

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Solution

The fourth proportional to 619,786.60, 929,679.90 and 514,810.60 is: 772,215.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,786.60 : 929,679.90 = 514,810.60 : x
  2. Step 2: Convert to fraction form
    619,786.60/929,679.90 = 514,810.60/x
  3. Step 3: Cross multiply
    619,786.60x = 929,679.90 × 514,810.60
  4. Step 4: Simplify right side
    619,786.60x = 478,609,067,126.94
  5. Step 5: Solve for x
    x = 478,609,067,126.94/619,786.60
  6. Step 6: Final answer
    x = 772,215.90

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.